Ruichi Wang

Nanjing Normal University · department of electrical & automation engineering

High-efficiency medium-range wireless power transfer using magnetically coupled resonators requires a wireless data link between the contactless coils to regulate power. Multiplexing the power transfer channel as the information channel is a cost-effective solution for the communication. However, existing technologies cannot transmit data across th...

The mismatch problem is commonly happened in photovoltaic (PV) systems due to partial shading conditions(PSCs). Distributed maximum power point tracking (DMPPT) architectures can be used to solve such problem. Reinforcement learning (RL) method which is one of the advanced artificial intelligence(AI) methods is proposed to improve the tracking spee...

This article proposes a novel embedded communication strategy for in-home energy routers (IHERs). It is based on the power/signal dual modulation (PSDM) principle and applied in the small-scale community energy local area network (E-LAN). The proposed communication strategy multiplexes power converters as data transmitters, and thus high cooperatio...

A generalized output branch with coupled inductor is proposed in this article, with which a diversity of single-input dual-output (SIDO) configurations can be synthesized through substituting it for the original inductor in the conventional single-input single-output (SISO) converters. Furthermore, for each configuration, multiple SIDO converters w...

Power electronics technology was only aimed at power conversion. However, with its development towards intelligence and modularization, communication needs to be integrated, and later on the info-nature of power converters is proposed. In this scenario, simultaneous power conversion and communication with power converters attract lots of attention,...

Power and signal dual modulation (PSDM) modulates both power and data at the same time, making it an appropriate communication method for power electronics applications. While conventional PSDM schemes use either duty cycle control or phase/frequency control of the gate signal for switching devices, which achieve limited bitrate performances, this...

This paper proposes a novel power flow tracing method based on power electronic signaling (PES) for peer-to-peer (P2P) electricity trading in DC microgrids. It employs a superimposed low-frequency sinusoidal carrier to trace DC power flows according to the bus port impedance characteristics of power converters. In order to support fair and accurate...

In direct current (DC) microgrids, communication between converters is necessary for better power distribution and finer energy scheduling. This paper proposes an orthogonal frequency division multiplexing (OFDM)-based carrier communication method for DC microgrid applications. The method integrates the communication function in the process of powe...

Visible light communication (VLC) system integrates LED lighting with wireless communication. Conventionally, power conversion and communication are designed separately. The circuitry added for communication helps to achieve a high bit rate, but increases costs and impacts the efficiency. On the other hand, power conversion and communication can al...

Power electronics and communication electronics are both based on electromagnetic theory, but they are usually regarded as two distinct subfields in electrical engineering. In fact, however, electric power is the most common matter-based carrier of messages; thus, power electronics and communications can be jointly considered. Here we study the ess...

For many distributed power systems (DPSs) such as light‐emitting diode lighting and battery management, communication is essential. This study presents an improved method of integrating power transfer and communication through a common bus by applying the concept of power/data time division multiplexing transmission (PD‐TDMT). The proposed method e...

Hardware structure is a basic characteristic of a battery management system (BMS), which influences overall performance of battery packs. This paper presents a novel BMS architecture based on the power/data time division multiplexing transmission (PD-TDMT) technique. In the proposed system, a common bus is employed to transfer power and data simult...

In Photovoltaic (PV) system, dc-dc power optimizer (DCPO) is an option to maximize output power. At the same time, data links among DCPOs are often required for system monitoring and controlling. This paper proposes a novel power line communication (PLC) method for the DCPOs, in which the data of a DCPO is modulated into the control loop of power c...

The energy internet concept has been considered as a new development stage of the Smart Grid, which aims to increase the energy transmission efficiency and optimise the energy dispatching in time and space. Energy router is a core device in the energy internet and it connects all the devices together into a net structure and manages power flows amo...

For intelligent dc distributed power systems (DC-DPSs), data communication plays a vital role in system control and device monitoring. To achieve communication in a cost-effective way, power/signal dual modulation (PSDM), a method that integrates data transmission with power conversion, can be utilized. In this paper, an improved PSDM method using...

Switched mode power supplies (SMPSs) are essential components in many applications, and electromagnetic interference is an important consideration in the SMPS design. Spread spectrum-based pulse width modulation (PWM) strategies have been used in SMPS designs to reduce the switching harmonics. This paper proposes a novel method to integrate a commu...

This paper proposed a hybrid sinusoidal-pulse current charging strategy (HSPC) for Li-ion battery in electric vehicle application. Phase shifting of pulse currents generated in paralleled boost converters is employed to overcome the power limitation in the sinusoidal ripple current (SRC) charging method. Simulation and experimental results demonstr...